根据句意，用所给单词的适当形式填空。He spends more time _______ (chat) with his friends on the Internet.
--- Do you know the _______ (climb) names? --- I don’t know them.
The boy and his mother are ________ (terrible) ill these days.
One can get ______ (lose) easily in big cities like Shanghai.
I think _______ (nature) food is good for our health.